Rust-loosening composition



Patented June 4, 1929.

UNITED STATES it FRANK M. IBOYNTON, OF PHILADELPHIA, PENNSYLVANIA.

RUST-LOOSENING COMPOSITION.

No Drawing.

The invention relates to rust loosening compositions particularly intended for use to loosen rusty surfaces as, for instance, the threads of nuts. As is well known to those skilled in the art, nuts, particularly those of "large diameter, become rusted to such an extent that it is impossible to remove them unless steps are taken to loosen the rust which has accumulated between the contiguous surfaces. Various rust penetrating compositions have been devised, but the action of these compositions is relatively slow and thereby tends to delay the workman.

I have discovered that a composition containing a proper amount of tetrachlorethane C H Ol acts on rust with extreme rapidity and is very effective. I prefer to combine the tetrachlorethane with some diluting substance, preferably a liquid hydrocarbon or petroleum derivative, as, for instance, kerosene,

' varnolene, or similar substances. Preferably the diluting substance consists wholly or chiefly of varnolene, which is aproduct well known in the art and may be designated as a petroleum fraction free from aromatic hydrocarbons and containing not over 2 per cent of unsaturated hydrocarbons; which etroleum fraction has an initial boiling 'pOlIlt between 300 F. and 310 F.. a dry or maxi- '30 mum boiling point between 400 F. and 415 Application filed July 31,

1925. Serial No. 47,378.

E, a flash point between 105 F. and 115 F., a fire point between 120 F. and 125 F and a gravity between 49 B. and 50 B.

The following formula is given as an illustration of a composition which produces excellent results, the proportion given being by weight Per cent.

Tetrachlorethane (3 1-1 01 55 Varnolene 35 40 Kerosene 10 Such a composition is non-infiammable,'relatively inexpensive, and acts with great rapidity.

What I claim is:

1. A rust penetratin composition which consists of tetrachlore lane and liquid hydrocarbons having a boiling point withinthe range of that of varnolene and kerosene, said composition being more than half tetrachlorethane, and said liquid hydrocarbons being more than half varnolene.

2. A rust penetrating composition which consists of tetrachlorethane about per cent 55 and varnolene 35 per cent and kerosene 10 per cent.

In testimony whereof I afiix my signature.

FRANK M. BOYNTON. 

